牛顿三大定律 牛顿运动定律 Newton's laws of motion 牛顿第一运动定律 Newton's first law of motion 即惯性定律 law of inertia 牛顿第二运动定律 Newton's second law of motion 牛顿第三运动定律 Newton's third law of motion 又叫 Action-reaction law
